Printing machine



A ril 28, 1936- H. GILBERTSON v PRINTING MACHINE Filed Feb. 21, 1955 2 Shets-Sheet l April 28, 1936. I 1. H. GILBERTSON 2,038,728

' I. PRINTING MACHINE I Filed Feb. 21, 1955 2 Sheec s$heet 2 /v (re /via,

Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE PRINTING MACHINE pany Application February 21, 1935, Serial No. 7,649 In Great Britain February 28, 1934 3 Claims.

This invention relates to printing machines and more particularly to the means by which the box wheels are adjusted relatively to the mandrels which they rotate for the purpose of controlling the register of the parts of the pattern being printed by the several printing rollers.

Heretofore it has been proposed to effect the desired adjustment by means of two brake drums associated with the worm and worm wheel by which the mandrel is driven from the box wheel, a brake applied to one brake drum ensuring an adjustment which advances the mandrel with relation to the box wheel and a brake applied to the other brake drum ensuring an adjustment which retards the mandrel with relation to the box wheel. It has also been proposed to operate all the brakes from one place by means of Bowdon controls so that the operator can observe the effects of the adjustments he is making.

The object of my present invention is to improve and simplify the means by which the brake drums effect the adjustment movements of the worm and worm wheel connection between a box wheel and its mandrel upon which the printing roller is secured. v

The invention comprises the combination with the box wheel and the mandrel driven thereby through a worm carried upon the box wheel and a Worm wheel upon the mandrel, of a drive to said worm comprising a wheel with which mesh both an idler wheel and a pinion upon a hollow spindle co-axial with and supported by a shaft like extension of the mandrel, the said idler wheel meshing with a pinion upon a further hollow spindle also co-axial with and supported by the said extension of the mandrel, the two hollow spindles having each a brake drum thereon.

The invention further comp-rises the improved combination and arrangement of parts hereinafter described.

Referring to the accompanying explanatory drawings:--

Figure 1 is an end View (with brake drums removed) looking from right to left, and Figure 2 an end view looking from left to right, in Figures 3 and 4 showing a construction of box wheel adjusting mechanism in accordance with this invention.

Figure 3 is a sectional plan view on the line 3-3 of Figure 1.

Figure 4 is a sectional elevation on the line 4-4 of Figure 1.

a is the box wheel, b the mandrel extension driven thereby and c the end of the print roller mandrel which is keyed to the mandrel extension b. The spring loaded plunger d serves to hold the box wheel in position on the mandrel 0.

Upon the spindle like extension e of the mandrel b is a sleeve 1 free upon the spindle having a pinion g thereon at one end and a brake drum h thereon at the other end. The pinion g meshes with an idler wheel a which in turn meshes with a broad face spur wheel i upon the spindle :i having a worm k which meshes with a worm wheel m upon the shaft n of the worm 0 which meshes with the worm wheel 10 on the mandrel b The shaft n is carried in brackets q upon the box wheel and is prevented thereby from endwise movement.

Around the sleeve f is a further sleeve 1' having a pinion s thereon at one end and a brake drum t thereon at the other end. The pinion s meshes directly with the broad face spur wheel i.

The spindle 7' carrying the wheel 2', and worm is, the spindle to carrying the idler wheel g and a rod or spindle v, carry at one end a spider like frame w which supports the outer and inner sleeves r and f and the extension e of the mandrel, and are secured at the other end in the box wheel a as shown in Figures 3 and 4.

An indicating finger a: secured upon the collar 1 upon the mandrel b serves to indicate the position of adjustment of the mandrel relatively to the box wheel.

It will be seen that the improvement described and illustrated provides a very simple and convenient form of mechanism for adjusting the box wheel a relatively to the mandrel b for it comprises essentially two co-axial hollow spindles or sleeves f and 1' each with a pinion and a brake drum thereon, the one pinion driving the broad face spur wheel 2' directly and the other driving it through the idler wheel 9 the two spindles or sleeves being carried by an extension of the mandrel.

The brake drums h and t form an enclosure for the wheels g, g 2' and s. The brake shoes :4 applied to the brake drums may be of any convenient form and operated in any convenient manner.

Due to the epioyclic movement of the broad face spur wheel 1' around the box wheel axis, the brake drums h and t are driven from such wheel at the same speed in the same direction. But if a brake be applied to one brake drum, the broad face spur wheel will be turned about its own axis in one or other direction and so by the worms and worm wheels before referred to, the box wheel mandrel b will be adjusted relatively to the box wheel in one or the other direction.

The brake drums may have a flat surface or a V groove therein and the brake block be shaped to correspond.

ing down. 7 V My improved mechanism can be lubricated'by' a grease gun applied to the end of the mandrel extension e which'has passage-ways 3 'therein leading tothe desired points.

What I claim is:- V 1. In printing machines, in combination a box wheel, a hollow mandrel within and extending in the form of a shaft axially fr orn saidbox wheel, the said mandrel having a worm wheel thereon, a worm carried by the box wheel and meshing with said worm wheel, a second worm wheel driving said worm, a second worm driving said sec- 0nd worm wheel,'a spindle carrying said second worm and a broad face spur wheel, an idler wheel engaging-said broad face wheel, a'hollow spindle upon the shaft like extension of the mandrel, a

- pinion and a brake drum secured up'onsaid hollow spindle, the said pinionrmeshing with said'idler wheel, a second hollow spindle upon the aforesaid hollow spindle, a pinion and a brake drum upon said second hollow spindle, the pinion meshing directly with the broad face wheel, and a spider supporting the hollow spindle and mandrel extensions, the said spider being carried by spindles from the box wheel.

2. In printing machines, in combination, a box wheel, a hollow mandrel within and extending in,

the form of a shaft axially from said box wheel,

Y a worm wheel upon said mandrel, a worm upon a worm shaft carried by' the box wheel, said worm meshing with said worm wheel, a worm wheel upon the worm shaft, a drive to the latter worm wheel comprising a worm, a shaft carrying said worm and a broad face spur wheel, an idler wheel and a pinion side by side engaging said broad face wheel, the said idler wheel meshing with a pinion uponv a hollow spindle co-axial with and supported by the mandrel extension, and the pinion which meshes with the broad face wheel being also upon a hollow spindle co-axial with and supported by the mandrel extension, and a'brake drum upon each of the hollow spindles.

3.-Inthe arrangement of claim 2, the arrangement of thetwo hollow spindles, one within the other so that the one provides a bearing surface for the other, the inner spindle being directly upon the extension of the mandrel.

ISAAC HAROLD GILBERTSON..' 

